Ultrasonographic Predictors of Hypotension After Induction

Pre-operative Ultrasonographic Evaluation of Inferior Vena Cava Collapsibility Index and Caval Aorta Index to Predict Hypotension After Induction of General Anesthesia

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT05239234

Enrollment

100

Registered

2022-02-14

Start date

2022-03-02

Completion date

2022-11-12

Last updated

2022-11-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

General Anesthesia, Hypotension on Induction

Brief summary

The purpose of the study is to evaluate the predictive value of the inferior vena cava collapsibility index and caval aorta index for detecting hypotension after induction of general anesthesia.

Detailed description

Since cardiovascular depressant and vasodilatory effects of anesthetic agents, patients may be at risk of hypotension after induction of general anesthesia. Previous studies reported that, for evaluating volume status, some ultrasonographic measurements such as inferior vena cava collapsibility index (IVCCI) could be used. Also some studies stated that measurement of aorta diameter index (IVC : Ao index) is reliable to predict hypotension after induction of spinal anesthesia. At the study, the investigators aimed to investigate the predictive values of the inferior vena cava collapsibility index and caval aorta index under ultrasound guidance in predicting post-induction hypotension in patients under general anesthesia.

Interventions

OTHERInferior vena cava-Aorta diameter index

Before the induction of general anesthesia, inferior vena cava-Aorta diameter index and inferior vena cava collapsibility index will be measured.

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 75 Years

Healthy volunteers

Inclusion criteria

* patients more than 18 years of age * American Society of Anesthesiologists' (ASA) physical status 1 or 2

Exclusion criteria

* BMI more than 30 kg/m² * Use of angiotensin converting enzyme inhibitors * pregnancy, * emergency operations * baseline arterial systolic blood pressure less than 90 mmHg * mean arterial blood pressure less than 70 mmHg

Design outcomes

Primary

Measure	Time frame	Description
Diagnostic value of IVCCI to detect post-induction hypotension assessed by Receiver operating characteristic (ROC) curve analysis.	20 minutes	Measurement of inferior vena cava collapsibility index.
Diagnostic value of IVC : Ao index to detect post-induction hypotension assessed by ROC curve analysis.	20 minutes	Measurement of inferior vena cava-Aorta diameter index.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026